PAC Racing 500 Series 10 Degree Valve Spring Retainer - 1.140 in/0.815 in OD Steps - 1.475 in OD Dual Spring - Titanium (Set of 16) 23-TR1-N-M 3/8 in NPT Left Side

3/8 in NPT Left Side

All other bases were designed off of adaptor flanges used twenty years ago

Upper and Lower

Valve stem

2013-2017 Freightliner S2C

PAC Racing 500 Series 10 Degree Valve Spring Retainer - 1.140 in/0.815 in OD Steps - 1.475 in OD Dual Spring - Titanium (Set of 16) 23-TR1-N-M 3/8 in NPT Left SideProduct Description: Valve Spring Retainer 500 Series 10 Degree 1. 140 in 0. 815 in OD Steps 1. 475 in OD Dual Spring Titanium Set of 16 PAC Racing Springs is part of the Race Winning Brands Family. With more than 100 years of spring manufacturing experience. We understand the demands of racing and provide a commitment to all of our customers to provide the best service possible. We continue to expand products and offer expanded onsite technical